LEB Ben
Arrogant A-hole At-Large
Hey fellas...cranked on the heat today in my 79 Bronco for the first time in a year, and much to my dismay had a slight issue. While parked, the heat came out on the floor like it should. However, the more gas I would give it during acceleration, the more the heat would switch from the floor to defrosters...and as I came back down to idle, the more it would go back to the floor. While cruising at speed, it's a 50/50 split. I'm thinking it's a matter of tracking down a vacuum issue. Thoughts?